body {
            font-family: 'IBM Plex Sans Thai', 'IBM Plex Sans', sans-serif;
        }
        .hero-section {
            background: linear-gradient(135deg, #0d6efd 0%, #0dcaf0 100%);
            padding: 2rem 0 4rem;
            color: white;
        }
        .logo-container {
            width: 120px;
            height: 120px;
            background: white;
            border-radius: 50%;
            margin: 0 auto 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        .logo-placeholder {
            font-size: 2.5rem;
            color: #0d6efd;
        }
        .program-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .program-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .grade-header {
            background: linear-gradient(45deg, #0d6efd, #0dcaf0);
            color: white;
            border-radius: 10px;
            padding: 2rem;
            margin-bottom: 2rem;
        }
        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: #0d6efd;
        }
        h1, h2, h3, .btn {
            font-weight: 600;
        }
        .lead {
            font-weight: 300;
        }